What is the cheapest airline that flies from San Juan to London?

JetBlue, United Airlines, and TAP AIR PORTUGAL are the most popular carriers operating from San Juan to London

When did momondo last update prices for flights from San Juan to London?

Prices for flights from San Juan to London refresh daily.

How old do you have to be to fly from San Juan to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£229 Cheap Flights from San Juan to London in 2025/26

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from San Juan to London

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

14:36 - 08:15SJU-LHR

13h 39m1 stop

11:25 - 19:55LHR-SJU

12h 30m1 stop

£381Iberia

Find Deal

Fri, 5 Dec - Fri, 12 Dec

13:57 - 09:00SJU-LHR

15h 03m1 stop

12:40 - 23:59LHR-SJU

15h 19m1 stop

£408KLM

Find Deal

Wed, 3 Dec - Wed, 10 Dec

14:10 - 10:15SJU-LHR

16h 05m1 stop

15:50 - 12:42LHR-SJU

24h 52m1 stop

£417KLM

Find Deal

Tue, 2 Dec - Tue, 9 Dec

17:50 - 10:50SJU-LHR

13h 00m1 stop

06:50 - 22:22LHR-SJU

19h 32m2 stops

£424United Airlines

Find Deal

Wed, 3 Dec - Wed, 10 Dec

07:15 - 06:20SJU-LHR

19h 05m1 stop

20:00 - 17:28LHR-SJU

25h 28m2 stops

£425Delta

Find Deal

Tue, 2 Dec - Tue, 9 Dec

02:05 - 20:35SJU-LHR

14h 30m1 stop

08:00 - 00:36LHR-SJU

20h 36m1 stop

£427Lufthansa

Find Deal

Tue, 2 Dec - Wed, 10 Dec

02:05 - 20:35SJU-LHR

14h 30m1 stop

08:30 - 22:22LHR-SJU

17h 52m2 stops

£432United Airlines

Find Deal

Tue, 2 Dec - Wed, 10 Dec

15:55 - 11:40SJU-LHR

15h 45m1 stop

08:55 - 20:57LHR-SJU

16h 02m1 stop

£442Air France

Find Deal

Thu, 22 Jan - Thu, 29 Jan

15:55 - 11:40SJU-LHR

15h 45m1 stop

08:55 - 20:57LHR-SJU

16h 02m1 stop

£443Air France

Find Deal

Thu, 22 Jan - Thu, 29 Jan

14:27 - 06:50SJU-LHR

12h 23m1 stop

20:00 - 12:56LHR-SJU

20h 56m1 stop

£460Delta

Find Deal

Wed, 19 Nov - Mon, 24 Nov

Delta flights from San Juan to London

Our best Delta deals on San Juan to London flight tickets

Delta

11 Nov

SJU13:57San Juan Luis Munoz Marin Intl

15h 03m

1 stop

LHR09:00London Heathrow

20 Nov

LHR15:50London Heathrow

26h 20m

2 stops

SJU14:10San Juan Luis Munoz Marin Intl

£424

Find similar

Delta

2 Dec

SJU07:15San Juan Luis Munoz Marin Intl

19h 05m

1 stop

LHR06:20London Heathrow

9 Dec

LHR20:00London Heathrow

25h 28m

2 stops

SJU17:28San Juan Luis Munoz Marin Intl

£425

Find similar

Delta

19 Nov

SJU14:27San Juan Luis Munoz Marin Intl

12h 23m

1 stop

LHR06:50London Heathrow

24 Nov

LHR20:00London Heathrow

20h 56m

1 stop

SJU12:56San Juan Luis Munoz Marin Intl

£460

Find similar

JetBlue flights from San Juan to London

Our best JetBlue deals on San Juan to London flight tickets

JetBlue

31 Dec

SJU01:59San Juan Luis Munoz Marin Intl

15h 41m

1 stop

LHR21:40London Heathrow

31 Jan

LHR08:05London Heathrow

19h 50m

1 stop

SJU23:55San Juan Luis Munoz Marin Intl

£524

Find similar

JetBlue

7 Mar

SJU05:10San Juan Luis Munoz Marin Intl

12h 50m

1 stop

LHR22:00London Heathrow

21 Mar

LHR07:25London Heathrow

19h 22m

1 stop

SJU22:47San Juan Luis Munoz Marin Intl

£535

Find similar

JetBlue

1 May

SJU15:00San Juan Luis Munoz Marin Intl

13h 30m

1 stop

LHR09:30London Heathrow

7 May

LHR11:55London Heathrow

15h 55m

1 stop

SJU22:50San Juan Luis Munoz Marin Intl

£536

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 5/12

14:36-08:15

1 stop13h 39m

London Heathrow

Fri 12/12

11:25-19:55

1 stop12h 30m

£381

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 3/12

13:57-09:00

1 stop15h 03m

London Heathrow

Wed 10/12

12:40-23:59

1 stop15h 19m

£408

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/12

14:10-10:15

1 stop16h 05m

London Heathrow

Tue 9/12

15:50-12:42

1 stop24h 52m

£417

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 3/12

17:50-10:50

1 stop13h 00m

London Heathrow

Wed 10/12

06:50-22:22

2 stops19h 32m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/12

07:15-06:20

1 stop19h 05m

London Heathrow

Tue 9/12

20:00-17:28

2 stops25h 28m

£425

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/12

02:05-20:35

1 stop14h 30m

London Heathrow

Wed 10/12

08:00-00:36

1 stop20h 36m

£427

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/12

02:05-20:35

1 stop14h 30m

London Heathrow

Wed 10/12

08:30-22:22

2 stops17h 52m

£432

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 22/1

15:55-11:40

1 stop15h 45m

London Heathrow

Thu 29/1

08:55-20:57

1 stop16h 02m

£442

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 22/1

15:55-11:40

1 stop15h 45m

London Heathrow

Thu 29/1

08:55-20:57

1 stop16h 02m

£443

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 19/11

14:27-06:50

1 stop12h 23m

London Heathrow

Mon 24/11

20:00-12:56

1 stop20h 56m

£460

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in January. Flight prices, which tend to average around £511, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from San Juan averaging around £512.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £507. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Juan to London for around £812.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £507. Flights in the morning are often more expensive, with an average ticket price of £878.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £630 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £490 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Direct flights	None

There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.

Search flight deals

How far is San Juan to London by plane?
San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 11h 57m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San Juan to London?
Prices for flights from San Juan to London refresh daily.
How old do you have to be to fly from San Juan to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Eastbourne

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Dover

Colchester

Chelmsford

Hayes

Worthing

Ramsgate

Dartford

Bedford

Winchester

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.